Fastener key



FIG. 1 is a top, perspective view of a fastener key in accordance with my design;

FIG. 2 is a bottom, perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevation view thereof;

FIG. 8 is a right side elevation view thereof; and,

FIG. 9 is a cross-section taken along line 9-9 of FIG.8. 

CLAIM The ornamental design for a fastener key, as shown and described. 